Generate cryptographically random UUID version 4 identifiers in your browser. Create one or many at once, then copy them for databases, APIs, and testing—nothing is logged or sent to a server.
Frequently asked questions
What is a UUID v4?
A 128-bit identifier formatted as 8-4-4-4-12 hex digits. Version 4 UUIDs are mostly random, with fixed version and variant bits per RFC 4122.
How are they generated?
We use the Web Crypto API (crypto.randomUUID or getRandomValues) so values are suitable for unique IDs in apps and tests.
Are UUIDs guaranteed unique?
Collisions are astronomically unlikely for v4 UUIDs. Still treat them as unique identifiers, not as secrets or authentication tokens by themselves.
Can I generate many at once?
Yes—choose a count up to 100 and copy all in one click.
Is generation private?
Yes. UUIDs are created locally and never transmitted by EverydayKit.